Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598237
Title: Branes and black holes in string theory
Author: da Costa, M. S.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 1999
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Abstract:
The goal of this thesis is to address several issues in gravitational physics, in particular black hole physics, within a quantum mechanical framework. Of course this requires the existence of such a quantum mechanical theory of gravity. Superstring theory is a consistent perturbative theory of gravity. However, many aspects of the theory turn out to be non-perturbative and in this sense the theory is still under construction. The theory of strings contains a large variety of p-dimensional spatially extended objects, now called p-branes. These p-branes are dynamical objects embedded in space-time: they interact between each other, intersect each other and bound themselves together. In this thesis I shall study some of these p-brane configurations. I shall start by using supergravity which is a large distance (low energy) approximation to string theory, to construct many new p-brane configurations. The emphasis will be on the technics to construct the supergravity solutions describing these configurations and on the symmetries of the underlying theory that render their existence. I shall not attempt to give a complete classification of the p-brane configurations folklore nor shall I address issues related to the global structure of the corresponding gravitational geometry. In turn, the focus will be on the microscopic and quantum mechanical description of some of these p-brane configurations, namely the D-brane bound states. In particular, I shall study in detail a D-5 brane configuration with a constant magnetic field on its worldvolume. The gravitational counterpart is a five-dimensional black hole. The quantum mechanical description of this system will allow the calculation of the Bekenstein-Hawking entropy from counting microscopic states of the D-brane system. The scattering of a scalar particle off the black hole (and therefore Hawking radiation) are also studied. I end by making a proposal for an effective string description of black hole dynamics. In the process I shall use results in perturbative string theory, gauge theory and gravitational theory. In this sense, this thesis is rather interdisciplinary which is a remarkable characteristic acquired by superstring theory.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.598237  DOI: Not available
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